NAT and MTU
Dan Nelson
dnelson at allantgroup.com
Tue Jul 8 18:08:10 PDT 2003
In the last episode (Jul 08), Brent Wiese said:
> I have a machine that is being double-NAT'd.
>
> Would it make sense to set the MTU lower to account for the NAT
> overhead?
>
> It makes sense to me as I know MTU, but I like to check in case my
> thinking isn't right. :)
There is no overhead; all NAT does is rewrite IP addresses in the
header (and in some data packets of certain protocols like FTP). It
adds no extra data.
--
Dan Nelson
dnelson at allantgroup.com
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